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L6668 데이터시트 PDF




STMicroelectronics에서 제조한 전자 부품 L6668은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 L6668 기능
기능 SMART PRIMARY CONTROLLER
제조업체 STMicroelectronics
로고 STMicroelectronics 로고


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L6668 데이터시트, 핀배열, 회로
L6668
SMART PRIMARY CONTROLLER
1 General Features
MULTIPOWER BCD TECHNOLOGY
LOAD-DEPENDENT CURRENT-MODE CON-
TROL: FIXED-FREQUENCY (HEAVY LOAD),
FREQUENCY FOLDBACK (LIGHT LOAD),
BURST-MODE (NO-LOAD)
ON-BOARD HIGH-VOLTAGE START-UP
wwwIM.DPaRtaOShVeEeDt4US.cToAmNDBY FUNCTION
LOW QUIESCENT CURRENT (< 2 mA)
SLOPE COMPENSATION
PULSE-BY-PULSE & HICCUP-MODE OCP
INTERFACE WITH PFC CONTROLLER
DISABLE FUNCTION (ON/OFF CONTROL)
LATCHED DISABLE FOR OVP/OTP FUNC-
TION
PROGRAMMABLE SOFT-START
2% PRECISION REFERENCE VOLTAGE EX-
TERNALLY AVAILABLE
±800 mA TOTEM POLE GATE DRIVER WITH
INTERNAL CLAMP AND UVLO PULL-DOWN
BLUE ANGEL, ENERGY STAR, EU CODE OF
CONDUCT COMPLIANT
Figure 2. Block Diagram
Figure 1. Package
SO-16 (Narrow)
Table 1. Order Codes
Part Number
L6668
L6668TR
Package
SO-16
SO-16 in Tape & Reel
SO16 PACKAGE ECOPACK®
1.1 APPLICATIONS
HI-END AC-DC ADAPTERS/CHARGERS FOR
NOTEBOOKS.
LCD/CRT MONITORS, LCD/CRT TV
DIGITAL CONSUMER
16
RCT
S-COMP
15
SLOPE
COMP.
HV
1
TIMING
CLK
VCC
5
25V
HV generator ON/OFF
and UVLO management
VREG
Vref
DIS
N.C.
7
2.2V
+
-
6
ISEN
12 HICCUP
+
-
1.5V
PFC_STOP
14
R
SQ
Vcc_OK
DIS
BLANKING
S
R
SQ
+
PWM
-
OCP
-
R
Vcc_OK
DIS
HYST. CTRL
Q
VREG
+ 0.4mA
-
+
DIS 2.2/2.7V
OCP
0.8V
9
11R
4R
SOFT-START
11
10
15V
STANDBY
8
VREF
4
OUT
3
GND
13
ST-BY
SKIPADJ
SS COMP
January 2006
Rev. 4
1/23




L6668 pdf, 반도체, 판매, 대치품
L6668
Table 4. Pin Description (continued)
Pin
Number
13
Pin Name
STBY
14 PFC_STOP
15 S-COMP
www.DataSheet4U.com
16 RCT
Function
Standby function. This pin is a high-impedance one as long as the voltage on pin COMP is
higher than 3V. When the voltage on pin COMP falls below 3V, the voltage on the pin tracks
that on pin COMP and is capable of sinking current. A resistor connected from the pin to the
oscillator allows programming frequency foldback at light load.
Open-drain ON/OFF control of PFC controller. This pin is intended for driving the base of a
PNP transistor in systems comprising a PFC pre-regulator, to stop the PFC controller at
light load by cutting its supply. The pin, normally low, opens if the voltage on COMP is lower
than 2.2V and goes back low when the voltage on pin COMP exceeds 2.7V. Whenever the
IC is shutdown, either latched (DIS >2.2V, ISEN >1.5V) or not (UVLO, SKIPADJ<0.8), the
pin is open as well.
Voltage ramp for slope compensation. When the gate-drive output is high the pin delivers a
voltage tracking the oscillator ramp (shifted down by one VBE); when the gate-drive output
is low the voltage delivered is zero. The pin is to be connected to pin ISEN via a resistor to
make slope compensation and allow stable operation at duty cycles close to and greater
than 50%.
Oscillator pin. A resistor to VREF and a capacitor to GND define the oscillator frequency (at
full load). A resistor connect to STBY modifies the oscillator frequency when the voltage on
pin COMP is lower than 3V.
Table 5. Electrical Characteristcs
(Tj = 0 to 105°C, Vcc=15V, Co=1nF; RT =13.3k , CT =1nF; unless otherwise specified)
Symbol
Parameter
SUPPLY VOLTAGE
Vcc Operating range
VCCOn Turn-on threshold
VCCOff Turn-off threshold
Hys Hysteresis
VZ Zener Voltage
SUPPLY CURRENT
Istart-up Start-up Current
Iq Quiescent Current
ICC Operating Supply Current
Iqdis Shutdown quiescent
current
HIGH-VOLTAGE START-UP GENERATOR
VHV Breakdown voltage
VHVstart Start voltage
Icharge Vcc charge current
IHV, ON ON-state current
IHV, OFF Leakage current (OFF state)
VCCrestart HV generator restart voltage
Test Condition
After turn-on
(1)
(1) After turn-on
Icc = 20 mA
Before turn-on,
Vcc=VccON-0.5
After turn-on
VDIS > 2.2, or VISEN > 1.5
VSKIPADJ<0.8
0.8 <VCOMP < VSKIPADJ
IHV < 100 µA
IVcc < 100 µA
VHV > VHvstart, Vcc > 3V
VHV > VHvstart, Vcc > 3V
VHV > VHvstart, Vcc = 0
VHV = 400 V
(1) After DIS tripping
Min. Typ.
9.4
12.5
8.0
13.5
8.7
4.0
22 24
150
2
180
1
1.3
700
60
0.55
80
0.85
4.4 5
12 13
Max.
22
14.5
9.4
28
2.5
4
1.8
105
1
1.6
0.8
40
5.6
14
Unit
V
V
V
V
V
µA
mA
mA
µA
mA
mA
V
V
mA
mA
µA
V
V
4/23

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L6668 전자부품, 판매, 대치품
L6668
3 Typical Electrical Performance
Figure 5. High-voltage generator ON-state sink
current vs. Tj
IHV (pin 1)
1.2
[mA]
1
Vcc 3V
0.8 VHV = 100 V
0.6
0.4
www.DataSheet4U.com
Vcc = 0
0.2
-50
0
50 100
Tj (°C)
150
Figure 6. High-voltage generator output (Vcc
charge current) vs. Tj
Icc (pin 5)
120%
VHV = 100 V
110%
100%
90%
Values normalized to Icc @ 25°C
80%
-50
0 50 100 150
Tj (°C)
Figure 7. High-voltage pin leakage vs. Tj
IHV (pin 1)
40
[µA]
VHV = 400 V
Vcc = 15V
30
20
10
0
-50 0
50 100 150
Tj (°C)
Figure 8. High-voltage generator start voltage
vs. Tj
HV
120%
110%
100%
90%
Values normalized to VHV @ 25°C
80%
-50
0 50 100 150
Tj (°C)
Figure 9. High-voltage generator Vcc restart
voltage vs. Tj
Vcc (pin 5)
14
[V]
while
12 latched off
10 VHV = 100 V
8
6 normal
operation
4
-50 0
50 100
Tj (°C)
150
Figure 10. IC consumption vs. Tj
Icc (pin 5)
5
[mA]
3
2
Operating
Quiescent
1
Vcc = 15 V
Co = 1 nF
0.5 f = 100 kHz
Disabled or
during burst-mode
0.3
0.2 Latched off
Before start-up (Vcc=12V)
0.1
-50 0
50
Tj (°C)
100
150
7/23

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